A Gas-Solid Riser Experiment for Fundamental Studies of Turbulent Multiphase Flow

Abstract

Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy under Contract DE-AC04-94AL85000.

Circulating fluidized bed hydrodynamics experiments for the multiphase fluid dynamics research consortium (MFDRC).

“…This report documents SNL efforts in the MFDRC. Some of the design and early testing of the CFB were also included in an earlier SAND report (Trujillo, et al, 2001a).…”

“…Instrumentation and measurement techniques are described in Chapter 4. Trujillo et al (2001a) discuss the early design and development of the CFB in detail.…”

“…The first two of these are described by Trujillo et al (2001a) and were "short" configurations (L/D ≈ 26) with either batch or continuous solid-particle return. The third is a "tall" configuration (L/D ≈ 41) with continuous solid-particle return and is the unit in which all data presented in this report were collected.…”

“…A vent line connected this angled standpipe to the relatively low-pressure region at the top of the downcomer, as suggested by the work of Karri et al (1995). Use of the vent allowed gas to flow to the top of the downcomer, preventing choking in the angled standpipe and generally improving the solids flow behavior (see Trujillo et al, 2001a).…”

“…See Trujillo et al (2001a) for more details. Motive air enters the engagement section via a vertical pipe (8.5-cm ID), a small amount of fluidization air enters the annular base of the engagement section (26.6-cm ID), and solid particles enter the engagement section from the right via the standpipe (7.6-cm ID).…”